He was the brother of Seargeoh Stallone, and half-brother of Sistine, Sophia, and Scarlet Stallone. He came from a show business family. His uncle was actor and singer Frank Stallone, and his grandmother was Jackie Stallone. Jennifer Flavin was his stepmother, and his godfather was actor Joe Spinell. Stallone was of Italian, French and Russian-Jewish ancestry on his father’s side.
Stallone was married briefly to Starlin Wright. The marriage was annulled in 2008. Stallone was found dead at 36 years old in his Studio City, Los Angeles home on July 13, 2012. Law enforcement stated that he could have been dead for at least three days up to a week. No one had heard from him in days. The Los Angeles Police Department told TMZ that evidence indicated Sage’s death was accidental.